Pedestal-extension-table lock.



,iun. 707,!86. E. TYDEN.

PEDESTAL EXTENSION TABLE LOOK.

Patented Aug. l9, I902.

(Application filed Feb', 19, 1902.

2 Sheets-Sheet L.

(No Model.)

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I /l (I Q No. 707,!86. Patented Aug. l9, I902.

E. TYDEN.

. g ilwggnm EXTENSION TABLE Lock.

(Application filed Feb. 19, 1902.)

(No Model.) 2 Sheets-Sheet 2.

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Mi?! 'W I a3 W'm m: NORRIS PETERS 60., mO'mUTHQ. WASHINGTON, D. c.

UNITE-D STATES EMIL TYDEN, OF HASTINGS, MICHIGAN.

PEDESTAL-EXTENSSION-QTABLELOCK.

SPEGIFICATIONi-Iormingpart of Letters ra a No. 707,186, dated August 19, 1902. Application filed February 19, IQOIZLII Serial No. 94,747. (No model.)

To all whom it may concern.-

Be it known that I, EMIL TYDEN, a citizen of the United States, and a resident of Hast ings, in the county of Barry, State of Michigan, have invented certain new and useful Improvements in Pedestal-Extension-Table Locks, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

The purpose of this invention is to provide means for locking securely together the parts of the pedestal extension-table to prevent the sagging apart of the pedestal parts, which is liable to occur at the bottom .in the absence of any suitable means for securing them ef-' fectively together.

The invention consists in a vertical reciprocating element operating at the position where there is commonly mounted a center leg to be inclosed by the pedestal parts when the table is closed up, such a reciprocating element having at a substantial distance below the table-top links pivoted to it extending outward toward the pedestal parts, respectively, the latter havingmeans for engaging these links, so that when the reciprocat ing element is moved endwise after such engagement the engaged ends of the links are compelled to move horizontally only, and this may be caused to draw the pedestal parts together if the device on each pedestal part is engaged by the link whose horizontal movement is toward the opposite pedestal part.

It consists also in means for giving the necessary endwise movement of the reciprocating element and for locking itagainst reacting except as'operated for that purpose.

It consists also in the specific construction set out in the claims.

In the drawings, Figure l is a partial sectional side elevation of a pedestal extensiontable having my improved locking device,

section being made at a vertical plane through the pedestal parts and axially with respect to the centerleg therein. Fig. 2 is a detail section axially with respect to the pedestal, showing the operating parts in a different position from Fig. 1. Fig.3 is a section at the line 3 3 on Fig. 2. Fig 4. is an elevation at the upper end of the operating-rod. Fig. 5 is a view similar to Fig. 1, showing a modified construction. Fig. 6 is a view similar to Fig.

2, relating to the construction shown in Fig. 5'. Fig. 7 is a section at the line 7 7 -on Fig. 6. i '11 are the two parts of-the table-top. 2 2 are the pedestal parts pertaining to them, respectively. v 3 is'one of the slides on which the bridge 4 is attached for carrying the center leg 5.

6 is an aperture formed axially in the center leg and through the bridge.

'7 is a transaxial aperture through the leg,

crossing the axial aperture at the lower end of the latter. 8 is a reciprocating rod or shaft extending in the aperture 6. Guide-bearings may be provided for this shaft in any convenient manner, as by a bearing-plate 9, mounted on the top of the bridge,and a bearing-bushing 10, forced into the axial aperture 6 of the center leg at a little distance above the transaxial aperture '7 At the upper end-theshaft 8 is connected by a shortlink 11 to one arm of a bell-crank lever 12, which is fulcrumed to the lug v13 of the plate 9, and'an operating rod or handle 14 is connected to the upstand ing arm of the bell-crank lever and extends off under the table-top toward one end,where, though ,out of sight, it isin convenientreach for operating when, the table having been closed togetheror requiring to be extended, it is necessary to operate the locking device. At the lowerend of the shaft Sin the form shown in Fig. 1, there are connected bythe same pivot two links 1515. Theselinks trend downward and apart from their pivot to the shaft, being stopped 'atthe position shown in Fig. l by lug'16 on each link encountering the side of the shaft. Y

On the inner face of each of ,the pedestal parts opposite the bearing plane there is mounted a bracket 17, said brackets each extending toward the opposite pedestal part and being of such lengththat they extend past each other when the pedestal parts are closed together, being sufficientlyout of line to stand side by side at their,lapping.por-- tions, each bracket having a lug 18 project- The outer end of each bracket may be sloped, as seen at 19, to prevent collision with the lug of the opposite bracket and cause each bracket to ride up onto the lug. Each of the brackets has at the outer end an upturned hook 20, forming a pivot-seat. The links 15 terminate in pivot bosses or studs 21 21, which are adapted to the seat in said pivot-seats. The transaxial aperture in the center leg is in proper position and of suit able extent in both dimensions to permit the brackets 17 17 to pass through it when the pedestal parts are closed together, and when they are as nearly together as they may stand when the top of the table is closed the operator by depressing or letting down the reciprocating shaft 8 causes the two links 15 15 to pass between the hooks 20 and their pivotbosses 21 to strike the upper edge of the brackets, so that upon further depression the links are spread outward, the pivot bosses traveling along the upper edge of the brackets the distance necessary to bring the bosses into the pivot-seats formed by the hooks 2O 20. Further depression of the shaft causes the hooks or pivot-seats of the brackets to be forced in opposite directions and the pedestal parts to be drawn together. The proportions of the several parts are such that by the time the pedestal parts are fully closed up the pivot of the shaft is slightly above the line connecting the centers of the pivot-bosses 21 21, and as it is forced down to and past that line the elastic compression and exten sion of all the parts concerned operate to prevent the return, and so look the parts in, that position, the lug 16 on each link stopping on the upper edge of the other links, where they lap by each other, a notch being made, if necessary, in the brackets where they lap by each other to permit the shaft to pass low enough to produce the locking effect described.

In the form of my invention shown in Fig. 2 instead of the links 15 15 trending downward and apart I provide links 23 23, which are stopped by a cross-arm 24 on the end of the shaft under them when they reach a horizontal position, to which they tend by gravity. Instead of the brackets 17 17 I provide brackets 24: 24, which are substantially in the form of staples shaped to be engaged by the hooked ends 25 25 to the links 23 23. For operating the shaft vertically I provide a bracket 26, projecting upward from the bearing-plate on top of the bridge, and two links 27 27, pivoted together, one of them being pivoted to the upper end of the bracket and the other to the upper end of the shaft, a thrustbar or operating-handle 28 being connected to them at their pivot. A spring 29 is provided coiled about the shaft within the center leg, reacting between the bottom of the cavity provided for it and a suitable stop provided on the shaft to uphold the latter in such a position that the hooks of the lugs 23 may pass freely over the staple-brackets 26 without engaging them. When the shaft is at its upper position, the links 27 27 are folded, as seen in Fig. 1 in full line. By thrusting the bar 28 inward the operator will straighten the links and force downward the shaft 9, with the effect first to cause the hooks on the ends of the links 23 to engage behind the staples, and the shaft being further depressed the links 23 will fold upward from their pivot, and the distance between the hooks being thereby shortened the pedestal parts will be drawn together. The parts may be so proportioned that the pedestal will be closed up just before the pivot of the links 27 27 reaches the line connecting the remote pivots of said links to each other-that is, to the bracket and to the shaft, respectivelyand as the movement is continued, forcing the pivot past that line, the elastic reaction of all the parts will tend to prevent the return, and a stop 30 being provided on the bracket in position to check the movement just after the line is passed by the pivot the parts will be held locked. The operator will release them by pulling back the operating-rod, with the effect, first, to allow the pedestal parts to sag apart at the bottom and the links 23 to become slack; next, the links 23 23 reaching a horizontal position will be picked up bodily by the cross-arm 21 and carried up out of reach of the staples, so that the table may be extended. In order to permit the rod 28 to be disengaged from the pivot on the links 27 when the table is extended and to be rengaged for the purpose of operating the links when it is closed up, such rod is provided with a fork 29, jutting off at right angles to the rod, and the latter is adapted to be rocked in its bearings on the table to throw the fork over to engage the pivot when the fork is depending and to throw it up to horizontal position for disengagement.

I claim 1. In a pedestal extension-table, in combination with the separable parts and the pedestal parts pertaining thereto, respectively, an element mounted so as to be inclosed in the pedestal and to reciprocate vertically; a pair of links pivoted to said element; brackets on the pedestal parts at a substantial distance below the table-top in position to be encountered by the free ends of the links when the reciprocating element is moved endwise, whereby said ends after such encounter are limited to lateral movement, each bracket having means for engaging the encountering link whose lateral movement is toward the opposite pedestal part, to check such lateral movement, and means for giving endWise movement to the reciprocating element.

2. In a pedestal extension-table in combination with the separable parts and pedestal parts pertaining thereto respectively, an element mounted on the center leg and adapted to reciprocate vertically; a pair of links pivoted to said element; brackets on the pedestal parts at a substantial distance below the table-top in position to be encountered by free ends of the links when the reciprocating element is moved endwise; whereby said ends an element mounted so as to be inclosed by the pedestal adapted to reciprocate vertically; a spring tending to uphold it and a means for depressing it against the spring; a pair of links pivoted to said element, brackets on the pedestal parts respectively at a substantial distance below the table-top in position to be encountered by the free ends of said links when the reciprocating element is depressed and to guide said ends laterally; each bracket having means for stopping the lateral movement of the link Whose said movement is toward the opposite pedestal part, whereby continued depression of the reciprocating e1e mentdraws the pedestal parts together.

4. In a pedestal extension-table in combination with the slide connecting-bridge, the

separable parts and pedestal parts pertaining thereto respectively, an element carried by the slide connecting-bridge mounted so as toreciprocate vertically; a pair of links pivoted to the lower part of said element; brackets on the'pedestal parts respectively at a substantial distance below the table-top in position to be encountered by the free ends of said links in the endwise reciprocation of the reciprocating element and to guide said ends laterally after such encounter, means by which the brackets respectively in such lateral movement of the links become engaged each with the link whose movement is-toward the opposite pedestal part; and means mount-- ed upon the slide connecting-bridge for giving endwise movement of the reciprocating element. e

5. In a pedestal extension-table, in combination with the separable parts and the pedestal parts pertaining thereto respectively,

an element mountedon the center leg and adapted to reciprocate vertically; a pairof links pivoted on said element and adapted to extend 01f therefrom in opposite directions; stops by which the links are checked at substantially horizontal position while left free to swing upward from such position; brackets on the pedestal parts respectively at a substantial distance below the table-top in cating element at its depressed position when the pedestal members are closed.

6. In a pedestal extension-table in combination with the upper structure consisting of the separable parts of the tableand the extension devices which connect-them, the pedestal parts pertaining to said separable table parts, respectively; devices for releasably connecting and disconnecting pedestal parts at a substantial distance below the table-top; 1

means for operating such devices, comprising a thrust-rod connected thereto at its lower end; -a pair of links connected together and connecting the upper end of said thrust-rod to the upper structure; means operating on the links to fold and straighten them, the links being free to fold in one direction, and a stop to arrest their folding in the other di- 'rection just beyond theirstraightened position.

7. In a pedestal extension-table in combination with the separable parts, the extension-slides connecting them, and the pedestal parts pertaining to the said separable table parts, respectively; devices carried bythe extension -slides for releasably connecting and disconnecting the pedestal members at a substantial distance below the table-top; a means for operating said devices comprising a vertically-movable rod connected therewith at its lower end; pivot carried by the extension-slides; a pair of links connecting theupper end of the rod to such pivot, the links being free to fold in one direction and a stop to arrest their foldingvin the opposite direction just beyond their straightened position; and

means operating on the links to' fold and straighten them. 7

8. In a pedestal extension-table in combination with the separable members, the extension-slides connecting them and the'pedestalnnembers pertaining to said separable members, respectively; devices carried by the extension-slides for releasably connecting and disconnecting the pedestal members at a tension-slides; a pair of links connecting the upper end of the rod'with such pivot, said links being free to fold in one direction, a' stop to arrest their folding in the opposite direction just beyond their straightenedposition, and an operating-rod mounted on a table member at the side toward which the links fold without restraint, said rod having a slot adapted to engage the pivot which connects the links, and being mounted so as to be rocked in its hearings to effect engagement and disengagement of the slot with the pivot; whereby the longitudinal operation of the rod folds and straightens the links to effect the locking and unlocking of the device.

9. In a pedestal extension-table in combination with an upper structure consisting of the separable members and extension devices connecting them, the pedestal members pertaining to said separable members, respectively devices carried by the upper structure for releasably connecting and disconnecting the pedestal members at a substantial distance below the table-top; means for operating said devices comprising a vertically-movable rod connected therewith at its lower end; a spring tending to uphold the rod, and devices carried by the upper structure operating on the upper end of the rod for depressing the rod and looking it in depressed position against the action of the spring, and means for unlocking it to permit the spring to lift the rod.

10. In a pedestal extension-table in combination with an upper structure consisting of the separable members of the table and the extension-slides which connect them; the pedestal members pertaining to said separable members, respectively; devices for releasably connecting and disconnecting the pedestal members at a substantial distance below the table-top; a means for operating such devices comprising a thrust-rod connected therewith at its lower end; a spring tending to uphold-the thrust-rod; a pair of links connected together and connecting the upperend of the rod with the upper structure; a means operating on the links to fold and straighten them, the links being free to fold in one direction and a stop to arrest their folding in the other direction just beyond their straightened position.

11. In a pedestal extension-table in combination with the separable parts and pedestal parts pertaining thereto respectively, an element mounted so as to be inclosed in the pedestal and to reciprocate vertically, a pair of links pivoted to the said element at the lower part, brackets on the pedestal parts respectively at a substantial distance below the table-top arranged to be encountered by the free ends of the links in the endwise movement of the reciprocating element and to guide them laterally after such encounter, said brackets being provided with means for becoming engaged each with the link whose said movement is toward the opposite pedestal part; a pair of links pivoted together one of them being pivoted to the reciprocating element and the other to a pivot fixed with respect to the support of said reciprocating element substantially in line therewith; a spring to uphold the reciprocating element and fold the links, and means extending under the table-top for forcing the pivot at which the links are connected together toward the line of the other pivot of said links, to depress the reciprocating element against the action of this spring.

12. In a pedestal extension-table in combination with the separable parts and pedestal parts pertaining thereto respectively, an element mounted so as to be inclosed in the pedestaland to reciprocate vertically, a pair of links pivoted to the said element at the lower part, brackets on the pedestal parts respectively, at a substantial distance below the table-top, arranged to be encountered by the free ends of the links in the endwise movement of the reciprocating element and to guide them laterally after such encounter, said brackets being provided with the means for becoming engaged each with the link whose said movement is toward the opposite pedestal parts a pair of links pivoted together one of them being pivoted to the reciprocating element and the other to a pivot fixed with respect to the support of said reciprocating element substantially in line therewith; a spring to uphold the reciprocating element and fold the links, and means extending under the table-top for forcing the pivot at which the links are connected together past the line of the other pivots of the links and a stop to arrest such movement when said line is passed by said pivot.

-13. In a pedestal extension-table in combination with the separable parts and pedestal parts pertaining thereto respectively an element mounted so as to be inclosed in the pedestal and to reciprocate vertically; a pair of links pivoted to the said element at the lower part, brackets on the pedestal parts respectively at a substantial distance below the table-top arranged to be encountered by the free ends of the links in the endwise movement of the reciprocating element and to guide them laterally after such encounter, said brackets being provided with means for becoming engaged each with the link Whose said movement is toward the opposite pedestal part; and the pair of links pivoted together one of them being pivoted to the reciprocating elementand the other to a pivot fixed with respect to the support of said reciprocating element substantially in line therewith; a spring to uphold the reciprocating element and fold the links; a rod mou11ted under the table above the bridge adapted to be reciprocated endwise to force the joint or pivot of the links to each other toward the line of the other two pivots of said links.

14. In a pedestal extension-table in combination with the separable parts and pedestal parts pertaining thereto, respectively; an element mounted so as to be inclosed in the pedestal and to reciprocate vertically; a pair of links pivoted to the said element at the lower part; brackets on the pedestal parts respectively at a substantial distance below the tabletop arranged to be encountered by the free ends of the links in the endwise movement of the reciprocating element and to guide them laterally after such encounter said brackets being provided with means for becoming engaged each with the link whose said movement is toward the opposite pedestal part; a pair of links pivoted together one of them being pivoted to the reciprocating element and the other to a pivot fixed with respect to the support of said reciproeating element substantially in line there- In testimony whereof I have herewith set 10 with; a spring to uphold the reciprocating my hand, in the presence of two witnesses, at element and fold the links, and ashaft or rod Hastings, Michigan, this 12th day of Februmounted on one part of thetable, adapted'to ary, 1902. v

be reciprocated in its bearings, having a lat- I 'EMIL TYDEN I eral fork for engaging the joint or pivotof the two links to each other and adapted to -Witnesses: be rocked in its bearings to engage and dis-{ CHAS. S. BURTON, engage the fork. l H. J. ADAMS. 

